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一、所有、正在执行、已停用、USB存储设备、已下载TAB页界面元素标注。

1、图标。

boolean ensureIconLocked(Context context, PackageManager pm) {
            if (this.icon == null) {
                if (this.apkFile.exists()) {
                    this.icon = this.info.loadIcon(pm);
                    return true;
                } else {
                    this.mounted = false;
                    this.icon = context.getResources().getDrawable(
                            com.android.internal.R.drawable.sym_app_on_sd_unavailable_icon);
                }
            } else if (!this.mounted) {
                // If the app wasn't mounted but is now mounted, reload
                // its icon.
                if (this.apkFile.exists()) {
                    this.mounted = true;
                    this.icon = this.info.loadIcon(pm);
                    return true;
                }
            }
            return false;
        }
    }

2、应用名称。

void ensureLabel(Context context) {
            if (this.label == null || !this.mounted) {
                if (!this.apkFile.exists()) {
                    this.mounted = false;
                    this.label = info.packageName;
                } else {
                    this.mounted = true;
                    CharSequence label = info.loadLabel(context.getPackageManager());
                    this.label = label != null ? label.toString() : info.packageName;
                }
            }
        }

3、大小。

ApplicationsState.AppFilter filterObj;
            Comparator<AppEntry> comparatorObj;
            private int mWhichSize = SIZE_TOTAL;
            boolean emulated = Environment.isExternalStorageEmulated();
            if (emulated) {
                mWhichSize = SIZE_TOTAL;
            } else {
                mWhichSize = SIZE_INTERNAL;
            }
            switch (mFilterMode) {
                case FILTER_APPS_THIRD_PARTY:
                    filterObj = ApplicationsState.THIRD_PARTY_FILTER;
                    break;
                case FILTER_APPS_SDCARD:
                    filterObj = ApplicationsState.ON_SD_CARD_FILTER;
                    if (!emulated) {
                        mWhichSize = SIZE_EXTERNAL;
                    }
                    break;
                case FILTER_APPS_DISABLED:
                    filterObj = ApplicationsState.DISABLED_FILTER;
                    break;
                default:
                    filterObj = ApplicationsState.ALL_ENABLED_FILTER;
                    break;
            }

void updateSizeText(CharSequence invalidSizeStr, int whichSize) {
        if (ManageApplications.DEBUG) Log.i(ManageApplications.TAG, "updateSizeText of " + entry.label + " " + entry
                + ": " + entry.sizeStr);
        if (entry.sizeStr != null) {
            switch (whichSize) {
                case ManageApplications.SIZE_INTERNAL:
                    appSize.setText(entry.internalSizeStr);
                    break;
                case ManageApplications.SIZE_EXTERNAL:
                    appSize.setText(entry.externalSizeStr);
                    break;
                default:
                    appSize.setText(entry.sizeStr);
                    break;
            }
        } else if (entry.size == ApplicationsState.SIZE_INVALID) {
            appSize.setText(invalidSizeStr);
        }
    }

大小的具体计算方式，请參考应用设置之属性、名词等解析。

4、5、空间。

此处的空间为应用所占的空间，属于机身存储设备区。计算方式：

try {
                        final long[] stats = mContainerService.getFileSystemStats(
                                Environment.getExternalStorageDirectory().getPath());
                        mTotalStorage = stats[0];
                        mFreeStorage = stats[1];
                    } catch (RemoteException e) {
                        Log.w(TAG, "Problem in container service", e);
                    }

二、正在执行界面元素标注。

1、图标。

public Drawable loadIcon(Context context, RunningState state) {
            if (mPackageInfo != null) {
                return mPackageInfo.loadIcon(state.mPm);
            }
            return null;
        }

2、名称。

void ensureLabel(PackageManager pm) {
            if (mLabel != null) {
                return;
            }
            
            try {
                ApplicationInfo ai = pm.getApplicationInfo(mProcessName,
                        PackageManager.GET_UNINSTALLED_PACKAGES);
                if (ai.uid == mUid) {
                    mDisplayLabel = ai.loadLabel(pm);
                    mLabel = mDisplayLabel.toString();
                    mPackageInfo = ai;
                    return;
                }
            } catch (PackageManager.NameNotFoundException e) {
            }
            
            // If we couldn't get information about the overall
            // process, try to find something about the uid.
            String[] pkgs = pm.getPackagesForUid(mUid);
            
            // If there is one package with this uid, that is what we want.
            if (pkgs.length == 1) {
                try {
                    ApplicationInfo ai = pm.getApplicationInfo(pkgs[0],
                            PackageManager.GET_UNINSTALLED_PACKAGES);
                    mDisplayLabel = ai.loadLabel(pm);
                    mLabel = mDisplayLabel.toString();
                    mPackageInfo = ai;
                    return;
                } catch (PackageManager.NameNotFoundException e) {
                }
            }
            
            // If there are multiple, see if one gives us the official name
            // for this uid.
            for (String name : pkgs) {
                try {
                    PackageInfo pi = pm.getPackageInfo(name, 0);
                    if (pi.sharedUserLabel != 0) {
                        CharSequence nm = pm.getText(name,
                                pi.sharedUserLabel, pi.applicationInfo);
                        if (nm != null) {
                            mDisplayLabel = nm;
                            mLabel = nm.toString();
                            mPackageInfo = pi.applicationInfo;
                            return;
                        }
                    }
                } catch (PackageManager.NameNotFoundException e) {
                }
            }
            
            // If still don't have anything to display, just use the
            // service info.
            if (mServices.size() > 0) {
                ApplicationInfo ai = mServices.values().iterator().next()
                        .mServiceInfo.applicationInfo;
                mPackageInfo = ai;
                mDisplayLabel = mPackageInfo.loadLabel(pm);
                mLabel = mDisplayLabel.toString();
                return;
            }
            
            // Finally... whatever, just pick the first package's name.
            try {
                ApplicationInfo ai = pm.getApplicationInfo(pkgs[0],
                        PackageManager.GET_UNINSTALLED_PACKAGES);
                mDisplayLabel = ai.loadLabel(pm);
                mLabel = mDisplayLabel.toString();
                mPackageInfo = ai;
                return;
            } catch (PackageManager.NameNotFoundException e) {
            }
        }

3、含有的服务以及进城详情。

mergedItem = new MergedItem(pi.mUserId);
                    for (ServiceItem si : pi.mServices.values()) {//构建内部mServices，mProcesInfo。
                        mergedItem.mServices.add(si);
                        si.mMergedItem = mergedItem;
                    }
                    mergedItem.mProcess = pi;
                    mergedItem.mOtherProcesses.clear();
                    for (int mpi=firstProc; mpi<(mProcessItems.size()-1); mpi++) {
                        mergedItem.mOtherProcesses.add(mProcessItems.get(mpi));
                    }

setDescription(context, (mProcess.mPid > 0 ? 1 : 0) + mOtherProcesses.size(),
                            mServices.size());

4、大小。

ong[] pss = ActivityManagerNative.getDefault()
                    .getProcessPss(pids);
boolean updateSize(Context context, long pss, int curSeq) {
            mSize = pss * 1024;
            if (mCurSeq == curSeq) {
                String sizeStr = Formatter.formatShortFileSize(
                        context, mSize);
                if (!sizeStr.equals(mSizeStr)){
                    mSizeStr = sizeStr;
                    // We update this on the second tick where we update just
                    // the text in the current items, so no need to say we
                    // changed here.
                    return false;
                }
            }
            return false;
        }

5、执行时间。

long activeSince = service.restarting == 0 ? service.activeSince : -1;
服务activie的时间
ai.mFirstRunTime = activeSince/*item.mActiveSince*/;
DateUtils.formatElapsedTime(builder,
                            (SystemClock.elapsedRealtime()-mFirstRunTime)/1000)

6、7、正在执行的空间计算。内存空间。

ActivityManager.MemoryInfo memInfo = new ActivityManager.MemoryInfo();
mAm.getMemoryInfo(memInfo);
SECONDARY_SERVER_MEM = memInfo.secondaryServerThreshold;

MemInfoReader mMemInfoReader = new MemInfoReader();
mMemInfoReader.readMemInfo();
        long availMem = mMemInfoReader.getFreeSize() + mMemInfoReader.getCachedSize()
                - SECONDARY_SERVER_MEM;
float totalMem = mMemInfoReader.getTotalSize();
            float totalShownMem = availMem + mLastBackgroundProcessMemory
                    + mLastServiceProcessMemory;